Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
Felt Piano Redefined for Mobile Creativity
$19.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Verve - Felt Piano App & AUv3: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited instrument variety.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price point for initial purchase.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Learning curve for beginners.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited social sharing features.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Felt Piano Redefined for Mobile Creativity Verve is a beautifully detailed virtual piano app, designed for iPhone and iPad and always ready to spark creativity, wherever you are. Its sound is warm, intimate, and full of emotion – ideal for cinematic scoring, ambient compositions, and expressive songwriting. Captured with absolute precision at Yamaha Studios in Los Angeles, Verve was designed to deliver a deeply personal and inspiring playing experience. With an intuitive interface and a wide range of expressive presets, Verve lets you create beautiful music instantly. Whether you're sketching ideas on the go or producing full tracks in our Cubasis music creation app, or any AUv3-compatible iOS DAW, Verve integrates seamlessly into your mobile workflow. Add layers, shape textures, and explore new sonic landscapes: Verve is more than a piano; it’s your creative companion, wherever inspiration strikes. • Beautiful felt piano, always with you • Add cinematic textures for emotional depth • A sonic masterpiece, captured with robotic precision • Perfect for intimate scores and warm, nuanced tones Recording Verve: Studio Precision, Mobile Ready Recorded at Yamaha Studios in LA by the HALion and Yamaha sound design teams, Verve’s felt piano tones were captured using a custom-built robot for ultra-precise key velocity and consistency. The result is a uniquely expressive instrument, now available as a mobile app for iPhone and iPad, ready to integrate into Cubasis or any AUv3-compatible iOS DAW. The Textures: Crafted Atmospheres Designed to deepen the emotional impact of Verve’s felt piano, the included textures blend effortlessly with its tone. Sourced from metal, glass, dry ice, electronic field recordings, and orchestral strings, they create immersive soundscapes which transcend the emotions. Whether you're using Verve on your iPhone, iPad, in Cubasis, or any AUv3-compatible mobile DAW, let these textures inspire you to explore new sonic worlds and craft something truly personal. Technical support https://forums.steinberg.net If you like Verve, please support us by rating this app in the App Store. Thank you!
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.